Molding-machine



D. H. BIBB.

MOLDING MACHINE.

APPLlcATloN FILED Nov. 21, 1919.

Patelnted Oct. 26, 1920.

I I ,I l l l l l 17H3 Ms/Walz UNITED As'r-.frlzs DANDRIDGE HUNTBIBB, or ALDwYoH, LoNDoN, ENGLAND.

Momma-MACHINE.

Specification of Letters Patent. Patented Oct. 26, 1,920

AApjrilication led November 21, 1919. Serial No. 339,710.

To all whom t may concern.' j r Be it known that I, BANDRIDGE HUNT BIBB, a citizen of the United States of Amen ica, and residing at the Valdorf I-Iotel, Aldwych, London, W. C; 2, England, have invented certain new and useful Improvements in Molding-Machines,`of whichthe following is a specification, such as will enable others skilled in the art to which it appertains to make andv use the same. This invention relates to molding Inachines of that type in which molds are formed on the periphery of a wheel or drum, or a pair of wheels or drums, and into which the material to be molded is fed.

A machine of this type is described in the specification of my application for United States Letters Patent Serial No. 310240 and the invention is applicable to machines of the kind therein described, and also to machines for other molding and shaping purposes.

According to the present invention, I make the said molds in separate sections or pieces, and removably attach them to the wheels lor drums, which are preferably octagonal and in which the backfaces of the mold-carrying portions are substantially flat, with such Y fitting, centering, registering or other means as may be found desirable according to the machine under construction.

The method of securing the sections or mold-carrying blocks may be as desired, but in a general way it is preferable to fix them by screwing means such as bolts and nuts,

or studs.

In machines for heavy use, and in which the material to be molded has to be subjected to great pressure, such for example as in the manufacture of briquets, the said segments or mold-carrying bodies are preferably provided with circular recesses or projections on their inner faces, which are adapted to take into or fit to similarly shaped projections or sockets on the substantially flat faces of the wheel or drum. In this construction it is advantageous to leave a. slight clearance for the inner portion of the said back faces as by providing a shallow rim around the edge of the said faces by countersinking or otherwise reducing the inner portion.

The molds may be formed entirely in the sections or blocks, or partly in one block and partly in another. The blocks may be arranged singly across the wheels or drums or two or more maybe fixed side by side, fand 1t will be understood that4 if the wheels or drums are substantially octagonal" in shape, the backs ofthe sections or blocks will be substantially flat and the faces carrying the mold recesseswill be curved and may have their outer edges sloped off;

When the backs of the blocks have circular, or other, projections, adapted to fit into corresponding recesses in the wheels or drums, the fixing bolts maybe fitted into these projections before the blocks are applied to the wheels or drumsy and there secured by side stub screws, or in other convement manner, the ends of the screws being passed through openings in flangesor welps on the wheels or drums and secured by nu s.

The inner edges of the projections are preferably slightlyy under-cut to prevent binding when the nuts are tightened.

I will now describe my invention with reference to the example of it which is shown in the accompanying drawings in which:-y

Figure l is a side elevation partly in section of a wheel or drum a having six flat faces b to which mold-carrying sections o are fitted. K I

Fig. 2 is a face or edge view partly in section of the wheel or drum shown in Fig. 1. y

In this example the segments c are twelve in number arranged in pairs on each of the fiat faces b. Each segment has a circularprojection el on its back face which is otherwise lat except lfor a small clearance around the projection. The projections fit into circular holes e in the faces band are therein held by bolts f fixed by stub screws and secured by nuts g.

Each of the faces b is slightly countersunk at hy thus forming ribs z' on which the sections rest.

It will be evident that the arrangemen of the sections in pairs close side by side and providing each section with a projection such as d insures easy and perfect fitting of the sections one to another without liability to turn out `of alinement.4 i

The cups 71: forming the molds or half molds in the sections are adapted to register with other cups in an adjoining wheel as described in my cited specification. It will be v observed that half cups only are made on the inner side and ends of the sections and these co-act With other half cups on the adjoining sections.

What I claim and desire to secure by Letters Patent is 1. A molding machine including a rotating element having bearing faces, formed with recesses Wholly Within the edges of said faces, the mold segments adapted to rest upon said hearing faces and having projections to seat Within said recesses and means threaded into the projection of each'segment and passed through and secured beyond a portion of the rotating element in line with said projection to secure the segment against movement radially ofthe rotating element.

2. A molding machine including a rotating element having bearing faces formed With recesses Wholly within the edges of tionadapted to seat in a corresponding recess in the bearing face, and means carried by said projection and adapted to be passed through the bearing faces and secured bef yond the same, for holding the segments in place. A

In Witness whereof I have hereunto set my hand in presence of two witnesses.-

DANDBIDGB HUNT BIBB. 

